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802.1w /802.1s - Diameter vs Max Hops

Juan Urti
Level 1
Level 1

Hi all!

What is the difference between the Diameter and the Max Hops Remaining in RSTP/MSTP?

Like Cisco, the maximun value for diameter is 7, but, can i have a ring topology with 10 switches in the Network?

Thanks!!!

Juan!!!

1 Reply 1

Andras Dosztal
Level 3
Level 3

There should be no more hops than 7 from the root bridge. If you have a ring topology, the furthest switch is 5 hops away is both directions.

I made a sketch to make it easier to understand. R is the root bridge, the orange line represents the blocked link. Obviously, the numbers are the number of hops.

If you had 16 switches in your ring, you would encounter problems.

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